Earth-auger.



No. 732,859. PATENTED JULY 7, 1903.

W. L. IWAN.

EARTH AUGBR.

AAAAAAAAAA N nun JUNE 21,- 1002.

Hi i mu I vii] luuu H my mm 4 cutting edges 0, and have downwardly-pro- 1 jeetinginwardly-curved bits and abruptly- WILLIAM L. IWAN, on STREATOR, ILLINOIS.

Patented July7, .1903.

E RTH-Austin;

SPECIFICATION formingpart of Letters Patent 110.732,}859, dated July .7, 1093.

Application filed June 21. 1902. Serial No. 112,578- (Fo model.)

To all whom, it may concern.-

a Be it known that LWILLIAM L. IWAN, a citizen of the United States, residing at Streator, in the county of Lasalle and State of'Illinois,

shave invented a new anduseful Improve-1 ment in Earth-Angers. of which the followin g is a pecification. l

.M y inyention relates toearth-au'gers of the type ill'ustratedin Patent No. 637,157, April 9, 18951, i

My2 primary object is' to provide an anger of thecharacter referred to of improved 'constrnction in mattersof detail, particular attention being. paid to adapting the anger to use in earths of varying cohesiveness,v to strengthening the blades and equipping them with a common point for the auger, and to supplying an adj nstablehandle.

v The invention is illustrated in the panyingdra'wings, in whicha Figure 1 is-a broken elevati' nal view of my improved auger; Fig. 2, a view of the lower portion of the deviceviewed from a different point than in Fig. 1 Fig. 3, a plan section taken as indicated at line 3jof Fig. 1, andFig. 4 abroken-yertical section takenas indicated e se 'Arepresents t hollow metal handle-stem equipped at its lowerendwith ahead or yoke A';B C, blades permanently secured, as by rivets a, to the yoke A; B 0, blade extenw-sions adjustably and removably connected with the blades B and o; D, an auger-point secured to the blades B and C, and E the handle-bars, having a hollow cross-form head ;E receiving the handle-stem A and adjustably secured thereon by set-screwsb.

The permanent blades B and C are preferably of the longitudinally-concave-convex form shown, are provided with chamfered The bits 0 overlap, as shown, and are cutaway or perforated near their points to receive the point D, the lattes-having a winged head conforming to the inner surfaces of the bits curved inwardly-projecting bits 0 c and removably securedto said .bits by bolts (1. The b1ade-sections or blade extensions B Q are of longitudinally-concavo-convexform,

1 and has avertical margin bearing upon forations "wi 1' 1 'whieh the correspondingbla-de the inner surface of the vertical blunt or butt edge margin of the corresponding permanent bladejpeing secured inplace by bolts .5 5 f.- Each blade extension has two sets of perforations f), either set of which may be brought into iregistration with the set of peris provide'd;,-"sothatthe extensions are adj ustablen ,adlh'eflower edges of said extensions are rounded at; f to iconform somewhat in outline W'ith-thecurve of the adjacent edges of thebits a as appears from Fig.- 3, the sections B, C lie wholly within an imaginary cylinder formed bythe cutting edges of the blades dfuifing revolutionlio'f the auger, so that they will'no t bind upon thesides of the hole-during the operation of boring. Ingj practice the blade extensions are used wheiitlloose or very wet wilds-encountered.

Thus theyafre sometimes required at one season oflthe year and are notrequired at another; seasons, Obviously. .they add .to the weight of ,therauger and should be removed when .n'otfrej nired'g i In. some cases it is desirable, ojhave their free vertical edges closer I to the ad jacenit cnttin' edges ofthdpermanent blades than at ot or times, and; this-is provided for in the feature of adjustability: ObViOUSlYcthB space between the blunt edges and cutting edges should be left as great aspermitted by the nature of the soil to facilitate emptying the auger.

'The improved anger is particularly useful for boringwells where loose soil, such as sand and gravel, is encountered, for in such use the-blade extensions serve to prevent the material from slipping out as the shovel is being hoisted.

Changes in details of construction within thev spirit of my invention may be made. Hence no undue limitation should be understood from the foregoing detailed description. What I claim as new, and desire to secure by'Letters Patent, is-- 1. In an earth-auger, the combination of Sui table permanent blades, and a removable blade-section serving when employed to close a portion of the space between adjacent ed gesf' 'i 00 of the permanent blades.

2. In an earth-auger, the combination of a handle,lon git idinally-concavoconvex blades attached therein, and longitudinally-concaveconvex blade-sections removably connected with said blades and closing a portion of the space between their edges.

3. Insheath-auger, the combination of suitable permanent blades, and blade-sections adjustably and rdmovably connected with said blades and serving when employed to close portions of the spaces between the edges of the permanent blades.

1-. In an earth-anger the combination of a handle,longitndinally-oonoavoconvex blades attached thereto and-provided with vertical cutting edges, downwardly projecting inonrved bits, and sharplyecurved inwardly-.

projecting bits, and longitudinally-concaveoonvex blade-sections removobly connected withthe blunt vertical edge portions of the blades.

, 5. In an earth-anger, the combination of suitable concave-convex blades and longitudinally-ooncavo-oonvex blade-sections adj ustably connected with the blunt vertical edge portions of the blades, for thepnrpose set forth.

6. In an earth-auger,thecombination of a handle,longitndinaily-oonoavo-oonvexblades attached thereto and provided with vertieel cutting edges, downwardly-projecting inonrved bits, and sharply-curved, inwardlyprojecting bits having overlapping end pertions, and an auger-point with an attachinghead bearing on the inner surfaces of said last-named bits and secured to said bits.

WILLIAM L. IWAN.

In presence of-- ALBERT D. BACOI,

' W. B. DAVIES. 

